Air-brush



0 Modl.)

v OVERMAN AIR BRUSH.

Patented Sept 5 WITNESSES I ICE/V702 UNITED STATES- PATENT OFFICE.

JOSEPH s. OVERMAN, or CANTON, OHIO.

AlR- -BRUSH.

SPECIFICATION forming part of Letters Patent No. 545,526, dated September 3, 1895.

Application filed March 15. 1895 To all whom it may concern- Be it known that I, JOSEPH S. OVERMAN, a citizen of the United States, and a resident of Canton, county of Stark, State of Ohio, have invented a new and useful Improvement in Air-Brushes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invention relates to an improvement in air-brushes, and consists-in providing a selfcentering needle-valve and mechanism for operating the needle and a regulating device.

With these objects in view my invention relates to certainfeatures of construction or combination of parts, as will be hereinafter described and claimed.

Figure 1 of the drawings is a sectional view of the invention enlarged. Fig. 2 is a perspective of the valve operating lever enlarged. Fig. 3 is a similar view of the color fountain or tube, natural size. Fig. 4 is a similar view of the tube-holder, and Fig. 5 is a crosssection of the end piece.

A denotes the body or tube holder, and B' the handle. The body portion A is preferably made of brass tubing of any desired size, preferably about three-eighths of an inch in diameter.. Both ends of the tube are open to receive the handle B and the color-tube O. A portion of the top is cut away, as shown. ;At the bottom side of the body A is provided an air-tube D, having a branch aleading to a.

place of supply of compressed air. In the branch at is provided a valve-seat b, a valve 0, and a coiled spring d, that hold the valve in position on the seat. The front end of the tube D is reduced and slightly tapering.

' The colortube 0 is preferably made of brass'tubing of such size as to fit into the holder or body A. The front end of the tube 0 is closed by a plug f, centrally apertured to allow the color to flow through f rdm the tube. On the plug or end piece f is provided an annular screw-thread g, on which is turned a truncated nose-piece h, having a small central aperture 41, through which the color is ejected.

end of the tube and as a support for the neejects of this invention are to provide a thin too At the rear end of the color-tube O is provided a removable plug j, that serves to close the Serial No. 541,639. (No modal.)

. dle-valve rod is, on the end of whichis loosely the valve-rod k, and a coiled spring m,-one end of which rests against the plngj and the other against the movable collar Z. The energy of the spring is exerted to hold the valve in the aperture ito stop the flow of the fluid color from the tube 0. At the rear end of the valve-rod It is provided an upwardly-projected pin 19,.by which the movement of the valve-rod and needle-valve is controlled. At the lower side of the tube 0 is provided an air-tube E to embrace the tube D, a conduit 0 connecting the tube E with the space inside the nose It.

To operate the valves 1) and k simultaneously an actuating device or lever, as shown in Fig. 2, is provided, havinga pin portion q to pass down through the body A and tube D, as shown, to engage the end of the valve 0. To this pin is pivotally secured a lever r, to which is pivotally secured a link 8 to engage the pin 19 on the needle-rod k.

At the rear of the lever r and loosely secured to the body A is provided a regulating mechanism comprising a screw t and support a. The support to is secured to the body by a screw o in such manner as to allow it to be turned to one side to allow of a full move ment of the leverr and be turned back to arrest the movement of the lever and thereby the movement of the needle-valve 10'. As heretofore constructed, the needle-rod has been made to extend forward and serve as a valve to regulate the. flow of the color; but in practice such structure has been found defective, in that the point of the needlevalve was not self-centering in the apertured of the nose-piece, and for that reason the di- On the valve-stem is provided a threaded collar 1, adapted to the thread on rection of the flow of the color from the end 7 of the nose could not be determined, as the needle-rod was too rigid to be influenced by the flow of the current of air. The prime 0bwire needle-valve k, loosely hung on the end of the rod is, that will be blown to the center of the aperture 1 by the current of air that carries forward the color from the tube, the pressure being equal on all sides.

To regulate the size of the line to be drawn I have provided a gage by which the strength or size of the line to be drawn may be determined from a so-called hair-line to a line two inches in Width. To produce the latter the gage may be swung to one side to allow a full throw of the lever a.

Having thus fully described the nature and object of my invention, what I claim is- 1. The combination in an air brush, of a color tube, having an aperture in the forward end thereof, an air duct leading thereto, a valve rod, a lever to move said rod longitudinally in the tube, a needle valve loosely secured to said rod, and adapted to close the said aperture in the color tube, whereby the color is carried forward and the needle valve laterally controlled or held central to the aperture bythe air blast, substantially as described and for the purpose set forth.

2. The combination in an air brush of a color tube, and holder, of the rod and needle valve loosely secured thereto, an actuating lever and a gage adapted to arrest the rearward movement of the lever, and to swing laterally out of the way of the lever, substantially as described and for the purpose set forth.

3. In an air brush, the combination with a color tube and an air tube adapted to eject the coloring matter from the former tube, of a valve for controlling the discharge from the color tube, said valve being loosely held in said color tube and adapted to be centered in the discharge opening of said color tube by the air blast, substantially as set forth.

In testimony whereof I have hereunto set my hand this 5th day of March, A. D. 1895.

JOSEPH S. OVERMAN.

Witnesses:

W. K. MILLER, CHAS. R. MILLER. 

